Light switch covers are used to cover the electrical box housing the light switch. Covering this box is important for both for safety and aesthetic reasons. Light switch covers come in a variety of colours and styles. They can be wooden, plastic or metal. You can even find themed light switch covers.
Unscrew the screws holding the light switch cover in place. Remove the screws and the old cover.
Place the new light switch cover over the light switch. The switch should fit easily in the hole in the centre of the cover.
Place the two screws that came with the cover into the holes on the top and bottom of the cover. Use a screwdriver to tighten these screws.
Turn off the power from the circuit breaker to the room where you are changing covers as an extra safety precaution.